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Rhodamine-based bis-sulfonamide as a sensing probe for Cu2+ and Hg2+ ions?

New Journal of Chemistry Pub Date: 2012-07-25 DOI: 10.1039/C2NJ40391A

Abstract

A new rhodamine-based bis-sulfonamide 1 has been designed and synthesized. The receptor selectively recognizes Cu²⁺ and Hg²⁺ ions in CH₃CN–water (4/1, v/v; 10 μM tris HCl buffer, pH 6.8) by showing different emission characteristics and color changes. While Cu²⁺ is sensed through increase in emission, Hg²⁺ is detected by a weak ratiometric change in emission of 1. The receptor shows in vitro detection of both the ions in human cervical cancer (HeLa) cells.

Graphical abstract: Rhodamine-based bis-sulfonamide as a sensing probe for Cu2+ and Hg2+ ions

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